3 ms·
Put quite simply - the energy doesn't go into destroying objects. There's only a very small amount going into heating things up from mechanical deformation [an
by eqvinox 6y ago
Put quite simply - the energy doesn't go into destroying objects. There's only a very small amount going into heating things up from mechanical deformation [and a bit into spinning], but fundamentally, splitting something in a million pieces just means you have a million pieces that have the same total kinetic energy in orbit.
However, they also exchange kinetic energy & impulse with each other, meaning you get a mix of slower and faster pieces. This is what the Gabbard diagram shows:
https://twitter.com/EU_SST/status/1380443036862316545 https://twitter.com/EU_SST/status/1380443036862316545
Anything that is sped up in the collision (i.e. "steals" energy from another piece) has the same perigee (orbit low point) but a higher apogee (orbit high point.) The reverse happens to anything slowed down / stolen from. That's why the graph looks like open scissors.
Some pieces with lower perigee will friction against earth atmosphere and burn up, but the ones with higher apogee become a serious problem...
(also, for anyone who can't remember to distinguish apogee & perigee: think of your periphery, it's the things close to you :D)
- JshWright 6y agoI think of "peripheral" as being "far from the center of my vision". Fortunately, years of Kerbal Space Program means the apo/peri prefixes are pretty solidly ingrained.
- eqvinox 6y agoAh crap :/ …well I guess the "center of vision" is the center of the orbit ellipse… ;D (just trying to salvage the mnemonic aid for myself)
- _0ffh 6y agoMy mental crutch was always Apogee Software. It's more intuitive that someone calls their company "High Point Software" than "Low Point Software".
- ithkuil 6y agoMy mental crutch is "apotheosis" (the high point of something)